What is hidradenoma?
Hidradenoma is a relatively rare tumor of sweat gland origin. Although traditionally regarded as displaying eccrine differentiation, it is now accepted that tumors can show either eccrine or apocrine differentiation. [1,2] This tumor found mainly in adults, and is excised more commonly in women than in men.
Is hidradenoma cancerous?
Nodular hidradenoma is a rare slow growing tumor of the scalp with high malignant potential. This tumour is a simulator of malignant lesions, including basal cell carcinomas and melanomas on clinical and dermoscopic examination.
What is a Nodular hidradenoma?
Nodular hidradenoma is a rare benign adnexal tumor. It is most frequently encountered in the head and neck region, trunk, and extremities. This tumor exhibits a high recurrence rate, and an association with malignancy. Many names have been used to describe this pathology.
What causes Nodular hidradenoma?
Nodular hidradenoma (NH) is a benign adnexal tumor that arises from either eccrine or apocrine sweat glands. NH can originate from any cutaneous site, but the most common sites are the head and anterior surface of the trunk, with very rare cases in the extremities.
What is clear cell Hidradenoma?
Clear cell hidradenoma is a benign skin appendage tumor that may mimic conventional-type renal cell carcinoma. Histologically, clear cell hidradenoma contains small ductular lumens, focal apocrine and squamoid change, and a less prominent vascular pattern than renal cell carcinoma.
What is a Hidradenoma Papilliferum?
Hidradenoma papilliferum is a rare benign tumor of apocrine glands. It usually presents as an asymptomatic flesh-colored nodule in the anogenital area of women. A 32-year-old female patient presented with an asymptomatic nodule of 4 months duration in the vulva.
What is solid cystic Hidradenoma?
Solid-cystic hidradenoma is a benign cutaneous tumor with eccrine sweat gland origins that is most commonly found in the head, neck, trunk, and upper extremity regions of patients in the middle to older age groups. These lesions are generally asymptomatic, slow-growing, solitary, and nonulcerative in presentation.
What is a Cylindroma?
Cylindromas are appendage tumors of uncertain histogenesis. They may occur as solitary or multiple lesions. In case of multiple lesions numerous small papules and/or large dome-shaped nodules are present on the scalp like a turban, hence the name turban tumor.
What are Hidrocystomas?
Disease. Eccrine hidrocystomas are small translucent, fluid-filled cysts of eccrine duct origin. They are considered to be ductal retention cysts, and often enlarge in conditions that stimulate perspiration. Hidrocystomas can be classified into solitary (Smith) type and multiple (Robinson) type.
What is a papillary Hidradenoma?
Papillary hidradenoma of the vulva is a rare, benign neoplasm arising from apocrine sweat glands of the skin. Frequently, this lesion has been mistaken for carcinoma. The treatment of choice is local excision. The prognosis for patients with this tumor is excellent.
Why is it called Cylindroma?
A variant of eccrine spiradenoma which can be multiple on the scalp and can coalesce to form a ‘Turban’ tumour. In pathology, a cylindroma is a tumour with nests of cells that resemble a cylinder in cross section.
What are trichoepitheliomas?
INTRODUCTION. Trichoepithelioma is a rare benign skin lesion that originates from hair follicles. Trichoepitheliomas are mostly seen in the scalp, nose, forehead, and upper lip. These skin lesions originate from benign proliferation of epithelial-mesenchymal origin cells.
How do you get hidrocystomas?
The exact cause of the hidrocystoma is unknown but it is hypothesized that the eccrine hidrocystoma is due to the obstruction of the eccrine sweat gland which causes the retention of secretions and the appearance of a dilated cystic structure.
Are hidrocystomas cancerous?
Hidrocystoma and basal cell carcinoma (BCC) are common eyelid lesions. The former is benign while the latter is malignant and can cause significant destruction of the adnexal structures, orbital invasion and visual loss.
Is Cylindroma cancerous?
Cylindromas are benign skin appendage tumors with two distinct clinical presentations, namely, solitary and multiple [2, 3]. Solitary cylindromas occur most commonly on the skin of the head and neck and occur sporadically and typically are not inherited [3, 4].
What is a hidradenoma?
Jump to navigation Jump to search. Hidradenoma (also known as acrospiroma, from akral “peripheral” + spiroma “epithelial tumor of sweat gland”) refers to a benign adnexal tumor of the apical sweat gland.
What is the prognosis of a hidradenoma?
Hidradenomas are by definition benign, with malignant transformation very rare. When tumors show malignant characteristics, they are known as hidradenocarcinoma. Surgical excision is usually curative and local recurrences are rare, although malignant tumors may metastasize.
What are the histologic characteristics of nodular hidradenomastend?
Nodular hidradenomastend to have epithelial lobules extending into the subcutaneous fat, rare tubular lumina, and multiple different cell types including round polyhedral cells, small round cells with scant cytoplasm, and clear cells. Endocrine Mucin-Producing Sweat Gland Carcinoma, a Histological Challenge
What is hidradenomapapilliferum?
Histopathological study of skin adnexal tumours–institutional study in South India Hidradenomapapilliferum is a relatively rare benign apocrine gland neoplasm that involves perianal, vulva, groin and with lower frequency axilla and periumbilical area.